Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cf6882ffe619f2…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 13:29:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3fb8d8ad81e8cfcac39a91a3b7ff9f55 SHA-1: aba91395efa163b0083b218b03b17ae184501b6c SHA-256: b7cf6882ffe619f2dc7ea014b5a510294196b99011e8ef26557da80496078db3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on a link related to 'free generator / game hack'. This heuristic, combined with the ML classification, strongly suggests a malicious intent to redirect users to potentially harmful content. The document body and extracted URLs indicate a lure for game-related cheats or currency, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/479516143/how-to-make-a-minecraft-server-for-free-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/best-roblox-exploits-free-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-stuff-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-button-simulator-3-hack-script_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-future-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/what-is-the-fastest-way-to-get-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/script-to-free-objet-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FB 23200 bytes
SHA-256: 70e27d15ac721a97174394ded03edb9f1abb1fa7e0b80e30a4ead28cc370d080
font_01_sfnt_off0000652e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 18448 bytes
SHA-256: b3df4715d3d10d222cd03830af22d55d1fd09053c89107a65193d49beb578ea8

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